ScienceExamCER: A high-density fine-grained science-domain corpus for common entity recognition

Hannah Smith, Zeyu Zhang, John Culnan, Peter Jansen

Research output: Contribution to journalArticlepeer-review


Named entity recognition identifies common classes of entities in text, but these entity labels are generally sparse, limiting utility to downstream tasks. In this work we present ScienceExamCER, a densely-labeled semantic classification corpus of 133k mentions in the science exam domain where nearly all (96%) of content words have been annotated with one or more fine-grained semantic class labels including taxonomic groups, meronym groups, verb/action groups, properties and values, and synonyms. Semantic class labels are drawn from a manually-constructed fine-grained typology of 601 classes generated through a data-driven analysis of 4,239 science exam questions. We show an off-the-shelf BERT-based named entity recognition model modified for multi-label classification achieves an accuracy of 0.85 F1 on this task, suggesting strong utility for downstream tasks in science domain question answering requiring densely-labeled semantic classification.

Original languageEnglish (US)
JournalUnknown Journal
StatePublished - Nov 23 2019


  • Corpus
  • Named entity recognition
  • Science

ASJC Scopus subject areas

  • General

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